Lock.



PATE/NTED 001:. so. v190s.

a. H. GARLSON.

, LOCK. APPLICATION FILED JAN.31. 1906'.

1H: NOR!!! FETIRS ca, wasumaion, D c.

- UNITED s'rA Es PATENT OFFICE.

CARL HARLMER 'OA'RLSON, OF BURLINGTON, IOWA.

LOCK.

v No. 834,709. 7

Specification of Letters Patent.

Patented .Oct. 30, 1.906.

Application filed January 31, 1906 Serial No. 298.780.

. variety of uses and which will require a key of novel and unusualform, thereby rendering the lock proof against unlawful interference.

Other objects of the invention are to provide a lock Which will havesimple mechanism and be durable in construction and which will be veryefficient and positive in its operation.

With these and other objects in view my invention consists of a lockcomprising a casing, a locking-bolt in the casing, a series oflocking-tumblers engaging the locking-bolt, recesses of various sizesformed in the turnblers, and a key having projections to engage.

the corresponding recesses in the tumblers.

My invention further consists of a lock embodying certain other novelfeatures of construction, combination, and arrangement of parts,substantially as disclosed herein.

Figure 1 is a front elevation of my improved lock in operative position.Fig. 2 is a vertical sectional view of the lock with the locking-bolt,tumblers, and key shown in elevation. Fig. 3 is a perspective view ofone of the tumblers. Fig. 4 is a similar view of the key..

Referring to the drawings, the numeral 1 designates the casing or shellof the lock, provided with the flattened end portions 2- for securingthe lock in position. Longitudinal parallel passages or channels 3 areformed in the casing, and intersecting the base of these passages is thetransverse passage 4, which extends through both side walls of theeasing. Adapted to slide in the transverse or horizontal passage is thelocking-bolt 5, having the shouldered portion 6 adapted to abut againstthe walls of the casing to limit the .movement of the locking-bolt andprevent removal thereof from the casing. At one end the locking-bolt isplain, as at 7, to engage the seat 8, formed in the. bolt receiver orkeeper 9, and at the other end it is formed with a handle or graspingportion 10. 'Inthe side ofthe bolt opposite the shoulderedrportion it isformed with seats or recesses 11 in line with the 1 parallel channels inthe casing.

Slidably mountedwithin' theaparallel. channels are the tumblers 12,which are the same length as said channels, and the ends of thesetumblers-are adapted to engage the recesses in the locking-bolt. Shallowrecesses 13 are formed in the upper faces of the tumblers, and therecesses in the tumblers are of different length or size. Thepartition-walls between the tumblers are cut away or recessed, as at 14,and the wall of the casing is provided with a keyway or opening '15 tocorrespond to the recesses of the tumblers when said tumblers are inengagement with the locking-bolt. In this particular lock thefirst-tumbler is formed with a comparatively long recess and the othertumblers with recesses of lesser length. A flat key is provided, havinga handle portion 16, and on the under side it is provided with a fiatface 17, adapted to rest on the locking-bolt when the key is inserted inthe lock. On the upper side the key is formed with the lugs orprojections 18 of different lengths and adapted to engage thecorresponding recesses in the tumblers.

After the key has. been inserted in the lock it is simplynecessary toraise the key, which action lifts the tumblers and disengages them fromthe locking-bolt, and the locking-bolt can then be moved to release itfrom the keeper.

It will be readily seen that the key cannot be withdrawn from the lockuntil the locking-bolt is in the closed or locked position.

Thus an extra safeguard is provided, which insures of the lock beingleft in the closed or locked position.

Many different locks may be made on this plan without departing from thespirit of the" which will be adaptable to a great many uses.

I claim 1. The combination with a casing having tumblers mountedparallel therein, of a locking-bolt slidably mounted'at right angles tothe tumblers and formed with recesses in one edge, the tumblers adaptedto engage said recesses when the bolt is projected, recesses formed inthe upper faces of the tumblers beginning on a line with the edge of thebolt when the tumblers are seated therein, a'key adapted to enter thecasing resting flush on the edge of the bolt and the recesses in thetumblers, and means for limiting the movement of the bolt.

2. The combination with a casing having tumblers mounted paralleltherein, of alocking-bolt slidably mounted at right angles to thetumblers formed with recesses in one edge for the reception of thetumblers and r 5

